Test a battery
Coin / button cell testers
Quick checks for CR / LR / SR cells. Open-circuit voltage is not capacity.
What this is for
These tools are chosen for the job described above, using maker specs where we can. Buy links are optional and never change a device’s battery answer.
Products
Coin cell / button cell battery tester
Best suited to: Quick check of CR / LR / SR button and coin cells before fitting
Tray or probe styles that accept common coin/button diameters